Self-Sealing Cartridge for E-Liquid Injection
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Solution Overview
Problem
Electronic cigarette cartridges prone to liquid leakage during e-liquid injection, complicating the filling process and reducing production efficiency.
Innovation Solution
A cartridge design featuring a sealing member made of rubber, silicone, or self-healing material that self-seals after a liquid injection needle pierces it to inject e-liquid into a storage cavity, with a vent pipe and atomizing head configuration to manage air pressure and prevent leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a liquid injection needle is used to inject e-liquid into the cartridge housing, then the liquid storage cavity can be filled with e-liquid, but liquid leakage occurs when the atomizing head is assembled after filling
Solution Approach 1:
The sealing member is pre-installed on the cartridge housing before e-liquid injection, creating a sealed environment that prevents leakage during subsequent atomizing head assembly. The sealing member includes a sealing surface that contacts the atomizing head to maintain liquid containment.
Solution Approach 2:
The sealing member acts as an intermediary element between the liquid storage cavity and the atomizing head, providing a dedicated sealing interface that prevents direct contact and potential leakage pathways between these components.
2Reliability
If the sealing member is made of self-healing material, then the pierced position can self-seal after needle removal, but the material selection is limited
Solution Approach 1:
The sealing member utilizes materials with specific physical properties (self-healing capability, elasticity) that enable automatic sealing after needle puncture. The material parameters are selected to provide both self-sealing function and compatibility with injection processes.
3Stress or pressure
If air is discharged through the atomizing head end during injection, then air pressure is balanced, but the injection process becomes more complex
Solution Approach 1:
The atomizing head serves dual functions: as the liquid absorption and vaporization component during normal operation, and as the air discharge pathway during e-liquid injection. This multi-functionality eliminates the need for separate venting structures.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Prevents e-liquid leakage during filling, simplifies the injection process, and enhances production efficiency by ensuring a secure and reliable filling mechanism.
Implementation Method 1
the sealing member is made of rubber, silicone or self-healing material... after the liquid injection needle is pulled out, the sealing member forms a self-sealing at the pierced position
Data Source
AI summary
A cartridge includes a cartridge housing, an atomizing head, and a sealing member. A liquid storage cavity for storing e-liquid is formed inside the cartridge housing. The atomizing head is located at one end of the cartridge housing, and the sealing member is located at the other end of the cartridge housing opposite to the atomizing head. The atomizing head is in communication with the liquid storage cavity and the outside. When a liquid injection needle is used to inject liquid into the cartridge, the liquid injection needle pierces the sealing member and extends into the cartridge housing to inject e-liquid into the liquid storage cavity. The air in the liquid storage cavity is discharged out through the end of the cartridge housing with the atomizing head. After the liquid injection needle is pulled out, the sealing member will form a self-sealing at the pierced position.